What will you learn in SOLID Principles: Introducing Software Architecture & Design Course
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Master the SOLID principles in object-oriented software design.
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Learn how to write scalable, maintainable, and robust code.
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Understand the architectural mindset behind clean code practices.
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Apply key design principles to real-world software problems.
Program Overview
Module 1: Introduction to SOLID Principles
⏳ ~30 min
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Topics: Importance of software architecture; benefits of clean code; evolution from procedural to object-oriented design.
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Hands-on: Watch 5 intro videos and analyze a poorly designed system to set context.
Module 2: Single Responsibility Principle (SRP)
⏳ ~1 hour
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Topics: The idea of one class, one job; breaking up responsibilities; real-world code smells.
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Hands-on: Refactor a monolithic class into multiple cohesive units using SRP.
Module 3: Open/Closed Principle (OCP)
⏳ ~1 hour
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Topics: Extend functionality without modifying existing code; abstract classes and interfaces; plug-and-play design.
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Hands-on: Implement open/closed architecture in a payment gateway use case.
Module 4: Liskov Substitution Principle (LSP)
⏳ ~45 min
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Topics: Ensuring subclasses substitute their parents safely; behavior contracts; avoiding inheritance misuse.
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Hands-on: Break and then fix a class hierarchy to follow LSP in a vehicle example.
Module 5: Interface Segregation Principle (ISP)
⏳ ~40 min
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Topics: Prefer many small interfaces; avoid “fat” contracts; flexible service interfaces.
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Hands-on: Design cleaner APIs for client classes using ISP.
Module 6: Dependency Inversion Principle (DIP)
⏳ ~1 hour
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Topics: High-level modules should not depend on low-level ones; invert control using abstractions.
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Hands-on: Introduce dependency injection and apply DIP in a notification system.
Module 7: Final Architecture & Case Study
⏳ ~1 hour
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Topics: Review SOLID principles; apply all five in a single end-to-end system; software engineering best practices.
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Hands-on: Build a mini project that demonstrates all SOLID principles working together.
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Job Outlook
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High Demand for Design-Oriented Developers: As systems grow complex, companies seek developers who can design clean, maintainable architectures.
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Career Advancement: Mastery of SOLID opens doors to software architect, tech lead, and senior developer roles.
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Salary Potential: Software developers with design and architecture expertise earn $90,000–$140,000+ annually (US average).
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Freelance Edge: Clean architecture is a selling point for freelancers building scalable apps or consulting on refactors.
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